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/*
* Id: kcurscol.c,v 1.3 1999/12/21 03:51:56 keithp Exp $
*
* Copyright © 1999 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "kdrive.h"
#include "cursorstr.h"
static int
KdComputeCmapShift (unsigned long mask)
{
int shift;
unsigned long bit;
shift = 16;
bit = 0x80000000;
while (!(mask & bit))
{
shift--;
bit >>= 1;
}
return shift;
}
#define Shift(v,d) ((d) < 0 ? ((v) >> (-d)) : ((v) << (d)))
void
KdAllocateCursorPixels (ScreenPtr pScreen,
int fb,
CursorPtr pCursor,
Pixel *source,
Pixel *mask)
{
xColorItem sourceColor, maskColor;
int r, g, b;
KdScreenPriv(pScreen);
if (pScreenPriv->screen->fb[fb].redMask)
{
r = KdComputeCmapShift (pScreenPriv->screen->fb[fb].redMask);
g = KdComputeCmapShift (pScreenPriv->screen->fb[fb].greenMask);
b = KdComputeCmapShift (pScreenPriv->screen->fb[fb].blueMask);
*source = ((Shift(pCursor->foreRed,r) & pScreenPriv->screen->fb[fb].redMask) |
(Shift(pCursor->foreGreen,g) & pScreenPriv->screen->fb[fb].greenMask) |
(Shift(pCursor->foreBlue,b) & pScreenPriv->screen->fb[fb].blueMask));
*mask = ((Shift(pCursor->backRed,r) & pScreenPriv->screen->fb[fb].redMask) |
(Shift(pCursor->backGreen,g) & pScreenPriv->screen->fb[fb].greenMask) |
(Shift(pCursor->backBlue,b) & pScreenPriv->screen->fb[fb].blueMask));
}
else
{
/*
* Set these to an invalid pixel value so that
* when the store colors comes through, the cursor
* won't get recolored
*/
*source = ~0;
*mask = ~0;
sourceColor.red = pCursor->foreRed;
sourceColor.green = pCursor->foreGreen;
sourceColor.blue = pCursor->foreBlue;
FakeAllocColor(pScreenPriv->pInstalledmap[fb], &sourceColor);
maskColor.red = pCursor->backRed;
maskColor.green = pCursor->backGreen;
maskColor.blue = pCursor->backBlue;
FakeAllocColor(pScreenPriv->pInstalledmap[fb], &maskColor);
FakeFreeColor(pScreenPriv->pInstalledmap[fb], sourceColor.pixel);
FakeFreeColor(pScreenPriv->pInstalledmap[fb], maskColor.pixel);
*source = sourceColor.pixel;
*mask = maskColor.pixel;
}
}
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